Mascara brush



FIG. 1 is a front view of the first embodiment of the mascara brush, showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a first side view thereof; and

FIG. 4 is a second side view thereof.

FIG. 5 is a front view of the second embodiment of the mascara brush, showing my new design;

FIG. 6 is a first side view thereof;

FIG. 7 is a second side view thereof; and,

FIG. 8 is a rear view thereof. 

CLAIM The ornamental design for a mascara brush, as shown and described. 